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參數(shù)資料
| 型號： | TS4984IQT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC16 |
| 封裝： | 4 X 4 MM, 0.50 MM PITCH, LEAD FREE, TQFN-16 |
| 文件頁數(shù)： | 14/29頁 |
| 文件大?。?/td> | 901K |
| 代理商： | TS4984IQT |
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Application Information
TS4984
21/29
Then, the power dissipated by each amplifier is:
and the maximum value is obtained when:
and its value is:
Note:
This maximum value is only depending on power supply voltage and load values.
The efficiency,
η, is the ratio between the output power and the power supply:
The maximum theoretical value is reached when VPEAK = VCC, so that:
The TS4984 has two independent power amplifiers, and each amplifier produces heat due to its power
dissipation. Therefore, the maximum die temperature is the sum of the each amplifier’s maximum power
dissipation. It is calculated as follows:
Pdiss L = Power dissipation due to the left channel power amplifier.
Pdiss R = Power dissipation due to the right channel power amplifier.
Total Pdiss =Pdiss L +Pdiss R (W)
In most cases, Pdiss L = Pdiss R, giving:
or, stated differently:
P
di ss
P
sup pl y
P
out
–
=
W
()
P
diss
22 V
CC
π R
L
------------------------
P
out
P
out
–
=
W
()
P
diss
P
out
--------------------- = 0
P
dissmax
2V
cc
2
π2R
L
-------------
=
W
()
η =
P
out
P
supply
--------------------- =
πV
PEAK
4V
CC
-------------------------
π
4
----- = 78.5%
Total P
diss
2P
di ssL
(W)
=
Total P
diss
42 V
CC
π R
L
------------------------P
out
2P
out
–
=
W
()
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS4985 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2x1.2w Stereo Audio Power Amplifier with Dedicated Standby Pins |
| TS4985EIJT | 功能描述:音頻放大器 2x1.2W stereo audio RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TS4985EIKJT | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2x1.2w Stereo Audio Power Amplifier with Dedicated Standby Pins |
| TS4985EKIJT | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2x1.2w Stereo Audio Power Amplifier with Dedicated Standby Pins |
| TS4990 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1W AUDIO POWER AMPLIFIER WITH ACTIVE LOW STANDBY MODE |
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